Port most of the remainder of //tools/android from GYP to GN

tools/android/heap_profiler/BUILD.gn

+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//testing/test.gni")
+
+shared_library("heap_profiler") {

[Yaron, 2015/09/28 21:35:25]

Do you need to annotate the corresponding gyp files with a comment so we know
the transition is done? (aside: is that just for humans or does a tool actually
consume that and check?)

[pkotwicz, 2015/09/29 14:24:52]

I asked agrieve@ and he is not aware of any scripts which consume the comments.
BUILD.gn in the root src directory is as close to a listing of what's left to be
converted that I know of. Most BUILD.gn files do not have comments

[Dirk Pranke, 2015/09/29 22:41:27]

Correct. There is no need to annotate something to indicate that a file or group
is done, we just label individual targets where possible.

+  sources = [
+    "heap_profiler_hooks_android.c",
+  ]
+  deps = [
+    ":heap_profiler_core",
+  ]
+}
+
+source_set("heap_profiler_core") {
+  sources = [
+    "heap_profiler.c",
+    "heap_profiler.h",
+  ]
+
+  configs -= [ "//build/config/compiler:chromium_code" ]
+  configs += [ "//build/config/compiler:no_chromium_code" ]
+}
+
+executable("heap_dump") {
+  sources = [
+    "heap_dump.c",
+  ]
+}
+
+test("heap_profiler_unittests") {
+  sources = [
+    "heap_profiler_unittest.cc",
+  ]
+  deps = [
+    ":heap_profiler_core",
+    "//testing/gtest",
+    "//testing/gtest:gtest_main",
+  ]
+}
+
+executable("heap_integrationtest") {

[Yaron, 2015/09/28 21:35:25]

Are executables automatically stripped on android? Presumably it's done cause
with debug symbols it's too slow to transfer to the device 

[pkotwicz, 2015/09/29 14:10:49]

It looks like it. heap_integrationtest is present in out/gn_Debug/exe.unstripped
build/toolchain/gcc_toolchain.gni offers support for stripping executables

+  testonly = true
+  sources = [
+    "heap_profiler_integrationtest.cc",
+  ]
+  deps = [
+    "//testing/gtest",
+  ]
+
+  configs -= [ "//build/config/compiler:chromium_code" ]
+  configs += [ "//build/config/compiler:no_chromium_code" ]
+}